Scapula is a large triangular flat bone situated in the dorsal part of the thorax between

Which bone has two curvatures?

$A$: Tibia is stronger and is present medially,whereas fibula is the outer and slender bone of the lower leg or shank.
$R$: Tibia has a sharp crest in the shaft and a projection on the inner side of the ankle called the lateral malleolus.

The appendicular skeleton includes all of the following $EXCEPT$:

Sesamoid bone is derived from

Bones of the limbs along with their girdles constitute the